Since it's been suggested - I have tried several "small" 375-425 VA UPS on
an Omni VI - usually to allow us to operate FD while the generators were
shut down. The setups were Astron 35's powering the rig and a keyer, and the
usual result was a blown UPS fuse within a few seconds of changeover - and in
one case a well fried UPS.
I think the problem is with the really poor output of the cheaper UPS, since
a couple of "pure sine wave" 1500 VA UPS did quite well. But those big boy's
are a long way from cheap.
And, one more thing. You definitely want to proved forced air ventilation for
any unsealed lead acid battery you might be using. A little accumulated
hydrogen makes a big bang.
73 Pete Allen AC5E
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